ICHNEUMON-FLIES — GELINAE : MESOSTENINI 101 



size, pentagonal; second recurrent maldng a 120° angle with basal 

 abscissa of subdiscoideus; first tergite of moderate length, with a small, 

 triangular, basolateral tooth; median dorsal carinae of first tergite 

 rather strong and sharp from its base to center of postpetiole; dor- 

 solateral carina of fu-st tergite strong and sharp throughout; post- 

 petiole mat, with a few small, weak punctures; second tergite mat, 

 with medium sized, shallow punctures that are separated by about 

 0.5 their diameter in male, by about 0.7 their diameter in female; 

 ovipositor sheath about 0.42 as long as front wing. 



Male: Black. Mandible yellow or fulvous; palpi yellow or white, 

 their apices brownish; antenna blacldsh brown, the scape often brown 

 in front; thorax black, the collar and hind corner of pronotum some- 

 times white, scutellum and postscutellum ferruginous, fuscous, or 

 white, and metathorax and propodeum often more or less ferruginous; 

 tegula white; front and middle legs fulvous, their trochanters largely 

 or entirely yellow and their tarsi brownish, darker apically; hind coxa, 

 trochanters, femur, and tibia ferruginous, the tibia a little darker and 

 the apical 0.18 ± of femur and tibia more or less infuscate ; first and last 

 segments of hind tarsus brown, the rest white, partly white, or brown, 

 if brown the joints paler; abdomen ferruginous, the &st tergite often 

 with, a median infuscate area, and basal 0.6 ± of tergites 2 and 3 often 

 more or less infuscate ; tergite 4 varjdng between entirely ferruginous, 

 fuscous with its apical half ferruginous, and entirely fuscous; fifth and 

 follomng tergites black, the seventh usually with a median apical white 

 spot, rarely the sixth with a small white spot. 



Female: Head black. Clypeus often with a ferruginous stain; 

 mandible ferruginous; palpi fuscous; antenna fulvous brown basally, 

 blackish brown apically, with a median white stripe above that covers 

 about 5 segments ; thorax ferruginous, in a few specimens more or less 

 infuscate anteriorly; tegula ferruginous; legs ferruginous, the fifth 

 tarsal segments brownish, apical 0.2 ± of hind femur infuscate, and 

 apical 0.2 ± of hind tibia weakly infuscate; hind tibia and tarsus light 

 ferruginous brown; abdomen ferruginous, the apex of the fom"th 

 tergite and all of the following black, the seventh and eighth tergites 

 each with a large white dorsal spot. 



Specimens (86 cf , 469) : From Connecticut (Stonington and Winni- 

 pauk); Delaware (New Castle); Indiana (Pinhook); Kansas (Law- 

 rence); Maine (Pittston); Maryland (College Park, Glen Echo, and 

 Takoma Park); Massachusetts (Amherst, Ai-nold Arboretum in 

 Boston, Holhston, Lexington, and Medford); Michigan (Ann Arbor, 

 Bath, Cheboygan Co., Clare Co., Dickinson Co., Glad'W'in Co., Grosse 

 He in Wayne Co., Isabella Co., Macomb Co., Manistee Co., Midland 

 Co., Osceola Co., and Roscommon Co.,); Minnesota (Cannon River); 

 New Hampshire (Hampton, Jaffrey, and Randolph); New Jersey 



